Carbon dioxide can change directly from the solid phase to the gaseous phase. true or false
1 answer:
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The amount left over after T years where P is initial amount is 
it halves each time so after t times of the 5000 years have elapsed, the amount is now (1/2)^t of the original amount
find how many half lives
10000/5000=2
(1/2)^2=1/4
1/4 of original amount after 10000 years
after 50000 years
50000/5000=10
(1/2)^10=1/1024
1/1024 of original amount after 50000 years
it dissapears when it attains an amount you deem is nigligible, so if you had 1 mol of subsutance, you might say it dissapears when it gets to 10^-23 or about 6.02 molecules
it halves each time so after t times of the 5000 years have elapsed, the amount is now (1/2)^t of the original amount
find how many half lives
10000/5000=2
(1/2)^2=1/4
1/4 of original amount after 10000 years
after 50000 years
50000/5000=10
(1/2)^10=1/1024
1/1024 of original amount after 50000 years
it dissapears when it attains an amount you deem is nigligible, so if you had 1 mol of subsutance, you might say it dissapears when it gets to 10^-23 or about 6.02 molecules
The formula for mole fraction is:
-(1)
The solubility of oxygen gas = 1.0 mmol/L (given)
1.0 mmol/L means 1.0 mmol are present in 1 L.
Converting mmol to mol:
So, moles of oxygen = 0.001 mol
For moles of water:
1 L of water = 1000 mL of water
Since, the density of water is 1.0 g/mL.
So, the mass of water is 1000 g.
Molar mass of water = 18 g/mol.
Number of moles of water =
Substituting the values in formula (1):
Hence, the mole fraction is .